Improvement in apparatus for sinking shafts



'I H, SONTAG.

Improvement in Appa'ratus for Sinking Shafts.

`Y INVENT'U Fh nl. f//ara-ur//zmmilc ca. mimmo/m? Moens) Y *i UNITED- STA'rns PATENT OFFICE.

HUGO SONTAG, or Sr. LOUIS, MISSOURI.

IMPROVEMENT IN APPARATUS FOR SINKING SHAFTS.

Specification forming part of Letters Patent No. 130,543, dated August 13, 1872.

Specification describing a certain Improved Shaft-Borin g Apparatus, invented by HUGO SONTAGU of the city andA county of St. Louis,

and State of Missouri.

My invention relates to the construction of a drill-frame and drills, as hereinafterfdcscribed.

Figure 1 is a side elevation of my device, showing the top cross-bar in section. Fig. 2 is an` elevation at right angles to Fig. l. Fig. 3 is a bottom view of the lower bits. Fig. 4 is a section at the line .fr w, Fig. 1. Fig. 5 is a Section at line y y, Fig. l. Fig. 6 is a section at the line z z, Fig. 1. Fig. 7 is a bottom view of the shank or neck by which the drill-frame is supported, and Fig. 8 is a top view, and Figs. 9 and 10 side views, of the same. Fig. 11 is a perspective view, representing the mode of attaching the shank to the upper part of the frame, as hereinafter described.

A B C D are horizontal bars, serving to connect together four vertical bars or drillrods, 4E E F F, to whose lower ends the bits G H are attached by socket-connections secured by traversing-keys i. `The outer bits G are T-formed in transverse section, the outer edge g being slightly curved to suit the inside of the shaft under construction. The edge g of these bits is in a radial direction, but somewhat inclined from the horizontal, as shown, so thatshaft-bottom' shall incline ldownwardly toward the center, causing the portions ofthe slots decreasing in depth'downward.V `The sides of the bits H are also grooved, as shown. These slots receive the ends of the struts K, whose office it is to prevent the bits from being forced inward.V L are rods, whose upper ends are screwed into the bar D, and whose lower ends rest upon or enter cavities in the struts to hold them down in their slots. The contiguous sides of the bits G H have slots or grooves to receive the edges of keys k, which serve to hold the bits rigidly in place.

A isa cross-bar extending at right angles to the bar A, and armed at each end with a bit, G', which bit acts to guide the frameand to smooth or perfect the inside of the shaft.` The frame is held together by rivets at the intersections, as shown. The shank or neck M is of crucial form at its base, (see Fig. 7,) and its upper end mis of tapering form, and enters a socket in the rod by which the frame is supported. I prefer to support the drill-frame upon my dropping apparatus or jarmovement 4for rock-drills, patented by me the 1st day of August, 1871, (No. 117, 573 5) but my drill-frame may be supported on any other suitable apparatus. The cross-bar N lies upon the upper side of the par A, fitting tightly between two lugs or blocks, a, forming part ot' or attached to the said bar. O are side projections of the shank. These projections have shoulders o embracing the upper part of the bar A, and channels or grooves o to rcceive the upper ends of the rectangular links or straps P extending down each side of the bar A, and beneath the cross-bar A', and secured by a gib, P1, and cotter or wedge P2 beneath the cross-bar. r are braces extending from the bar A to bar B, and lr are braces extending from cross-bar A' to bar B.- I do not confine myself to four rods, E-F, as shown, or to a frame of any particular width; but the frame shown is supposed to have a width of seven feet from g to g, and from G to G and the drill-rods or bars E F to be of five-inch square iron. Any number of rods or bars E F may be used. The frame may be fifteen feet, more "or less, in length.

The operation of my apparatus is similar to that of other drop-drills-f-viz, it is alternately raised and allowed to fall, andmay have partial rotation at each stroke, (by suitable mechanism,) if desired.

I claim as lmy invention@ 1. The combination of the bits G H, when constructed and arranged as described, the

keys k by which they are connected and made 3. The connections N 0 l? P1 P2 between the mutually supporting, and the bars E F to the shank or neck M and the upper bar A of the ends of which they are attached, all substanframe.

tiany as and for the purposes set forth. HUGo soNTAG.

2. The struts K and screw-rods L, in com- Witnesses binaton with the bars D E F and bits G H, SAML. KNIGHT,

substantially as and for the purposes set forth. R. F. ROADLEY. 

